Between the late Middle Ages and the early modern period, large quantities of wax were exported from the Maghrib to Europe. In the Maghrib, both raw wax and wax candles were involved in various social interactions that transcended mere environmental and economic considerations. For some Muslims, wax came to index Christianity, and its significance during the celebration of the Prophet’s birthday was critiqued as a corrupt innovation. At the same time, to prevent the facilitation of Catholic devotion—and because wax was deemed war material—the sale of wax to Christians was forbidden. Nevertheless, wax remained a profitable product sold to Christians in significant quantities. The anxiety surrounding the movement of wax and the attempts to regulate it indicate that for Muslims, wax served as a religious boundary marker. Christians too utilized the substance to reinforce communal boundaries. Catholics in the Maghrib—captives, clergy, and merchants—used wax to establish and express confessional divides, aiming to deter Catholic captives from converting to Islam. Priests distributed blessed candles to captives, who in turn donated wax to the clergy. Moreover, priests gifted candles to Algerian dignitaries, a practice opposed by the papacy. Wax formed invisible, often unintended connections between Muslim theologians and rulers, Catholic and Muslim captives, slaves, wax makers, merchants, and redeemers. These entanglements sparked anxiety, a sense of impurity, and a drive to reinforce religious boundaries. This article explores a fragmented history of these connections and relationships and argues that the failed attempts to regulate this circulation fostered new entanglements.